/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package cn.icanci.design.structure.compositepattern;

import java.util.ArrayList;
import java.util.List;

/**
 * @author icanci
 * @date Created in 2021/07/17 11:09
 * @version 1.0
 */
public class Composite extends Component {

    private List<Component> components;

    public Composite(String name) {
        super(name);
        this.components = new ArrayList<>();
    }

    @Override
    public String operation() {
        StringBuilder stringBuilder = new StringBuilder(this.name);
        for (Component component : components) {
            stringBuilder.append("\n");
            stringBuilder.append(component.operation());
        }
        return stringBuilder.toString();
    }

    @Override
    public boolean addChild(Component component) {
        return this.components.add(component);
    }

    @Override
    public boolean removeChild(Component component) {
        return this.components.remove(component);
    }

    @Override
    public Component getChild(int index) {
        return this.components.get(index);
    }
}
